Secure Your AI
Conversations.
A privacy-first browser extension that detects & blocks sensitive data before you send it to ChatGPT, Claude, and others.
Hey Claude, can you help debug this code snippet?
const stripe_key = "sk_live_abcdef1234567890";
Also, my phone is +1-555-0192.
Key Privacy Features
Comprehensive protection for your sensitive data when using AI assistants.
PII & Credential Protection
Detects emails, phone numbers, SSNs, credit cards, and other personally identifiable information globally.
Shannon Entropy Analysis
Uses information theory to identify unknown secrets and high-randomness strings that are likely sensitive.
True Local Processing
All scanning happens in your browser. No server-side analysis ever. Your data never leaves your device.
API Key Detection
Identifies API keys from OpenAI, AWS, GitHub, Stripe, Azure, Google, and 20+ other providers.
Pre-submission Warning
Shows a popup before sending, giving you full control to redact, edit, or proceed with your prompt.
Real-time Scanning
Automatically scans as you type with minimal performance impact. No waiting, no delays.
Works With Your Favorite AI Platforms
Prompt Guard seamlessly integrates with all major AI assistants.
Start Protecting Your Data Today
Install Prompt Guard in seconds. No account required for the free version. Your sensitive data stays on your device — always.